Merge branch 'master' into voice-rewrite

src/client/Client.js

@@ -70,11 +70,10 @@ class Client extends BaseClient {
     this.voice = !browser ? new ClientVoiceManager(this) : null;
 
     /**
-     * The shard helpers for the client
+     * Shard helpers for the client (only if the process was spawned from a {@link ShardingManager})
-     * (only if the process was spawned as a child, such as from a {@link ShardingManager})
      * @type {?ShardClientUtil}
      */
-    this.shard = !browser && process.send ? ShardClientUtil.singleton(this) : null;
+    this.shard = !browser && process.env.SHARDING_MANAGER ? ShardClientUtil.singleton(this) : null;
 
     /**
      * All of the {@link User} objects that have been cached at any point, mapped by their IDs

src/sharding/Shard.js

@@ -42,6 +42,7 @@ class Shard extends EventEmitter {
      * @type {Object}
      */
     this.env = Object.assign({}, process.env, {
+      SHARDING_MANAGER: true,
       SHARD_ID: this.id,
       SHARD_COUNT: this.manager.totalShards,
       CLIENT_TOKEN: this.manager.token,

src/structures/Channel.js

@@ -69,7 +69,7 @@ class Channel extends Base {
    * @example
    * // Delete the channel
    * channel.delete()
-   *   then(console.log)
+   *   .then(console.log)
    *   .catch(console.error);
    */
   delete() {